Starbucks doesn't have an official slogan. However, they do have an official mission statement. Their mission statement is, "To inspire and nurture the human spirit–one person, one cup and one neighborhood at a time."
The principles that follow their mission statement focus on the quality of their product, the service provided to their customers, the treatment of their suppliers, their stores being a haven for comfort, their involvement in the community and the value delivered to their shareholders.
The first Starbucks opened in 1971. The company now operates over 21,000 stores. They have an established presence in 65 countries and are continuing to grow.